[U-Boot] [PATCH 03/22] Update WARN_ON() to return a value

[Simon Glass]

In linux v4.9 this returns a value. This saves checking the warning
condition twice in some code.

Update the U-Boot version to do this also.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 include/linux/compat.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/compat.h b/include/linux/compat.h
index a43e4d66983..03f9bef0dae 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -106,8 +106,12 @@ static inline void kmem_cache_destroy(struct kmem_cache *cachep)
 #define BUG_ON(condition) do { if (condition) BUG(); } while(0)
 #endif /* BUG */
 
-#define WARN_ON(x) if (x) {printf("WARNING in %s line %d\n" \
-				  , __FILE__, __LINE__); }
+#define WARN_ON(condition) ({						\
+	int __ret_warn_on = !!(condition);				\
+	if (unlikely(__ret_warn_on))					\
+		printf("WARNING in %s line %d\n", __FILE__, __LINE__);;	\
+	unlikely(__ret_warn_on);					\
+})
 
 #define PAGE_SIZE	4096
 
-- 
2.11.0.483.g087da7b7c-goog